Hello PSPad doesn't contains sych feature. But you can use scripting to write your own functionality what will make this job for you.
-- <https://forum.pspad.com/read.php?2,70181,70186> PSPad freeware editor https://www.pspad.com
- Split a txt file with pspad [70181] Angel Torres
- Re: Split a txt file with pspad [70186] Jan Fiala
- Re: Split a txt file with pspad [70191] Angel Torres
- Re: Split a txt file with pspad [70192] Jan Fiala
- Re: Split a txt file with pspad [70196] Andreas Burg
- Re: Split a txt file with pspad [70200] Angel Torres
- Re: Split a txt file with pspad [70201] Angel Torres
- Re: Split a txt file with pspad [70204] Angel Torres
- Re: Split a txt file with pspad [70655] therium
- Re: Split a txt file with pspad [70657] Angel Torres
